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mm/page_owner: constify dump_page_owner 

dump_page_owner() only uses struct page to find the page_ext, and
lookup_page_ext() already takes a const argument.

Link: https://lkml.kernel.org/r/20210416231531.2521383-4-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2021-06-28 19:41:16 -07:00 committed by Linus Torvalds
parent be7c701fd4
commit 8bf6f451bd
2 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
include/linux/page_owner.h
View File

@ -14,7 +14,7 @@ extern void __set_page_owner(struct page *page,
extern void __split_page_owner(struct page *page, unsigned int nr);
extern void __copy_page_owner(struct page *oldpage, struct page *newpage);
extern void __set_page_owner_migrate_reason(struct page *page, int reason);
extern void __dump_page_owner(struct page *page);
extern void __dump_page_owner(const struct page *page);
extern void pagetypeinfo_showmixedcount_print(struct seq_file *m,
pg_data_t *pgdat, struct zone *zone);
@ -46,7 +46,7 @@ static inline void set_page_owner_migrate_reason(struct page *page, int reason)
if (static_branch_unlikely(&page_owner_inited))
__set_page_owner_migrate_reason(page, reason);
}
static inline void dump_page_owner(struct page *page)
static inline void dump_page_owner(const struct page *page)
{
if (static_branch_unlikely(&page_owner_inited))
__dump_page_owner(page);
@ -69,7 +69,7 @@ static inline void copy_page_owner(struct page *oldpage, struct page *newpage)
static inline void set_page_owner_migrate_reason(struct page *page, int reason)
{
}
static inline void dump_page_owner(struct page *page)
static inline void dump_page_owner(const struct page *page)
{
}
#endif /* CONFIG_PAGE_OWNER */

2
mm/page_owner.c
View File

@ -392,7 +392,7 @@ err:
return -ENOMEM;
}
void __dump_page_owner(struct page *page)
void __dump_page_owner(const struct page *page)
{
struct page_ext *page_ext = lookup_page_ext(page);
struct page_owner *page_owner;